A4LD Tranny symptom
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Junior User
Joined: Aug 2003
Posts: 83
Likes: 0
From: Bergen, Norway
A4LD Tranny symptom
Sudden hesitation at high speed during a long trip.
After a long, winding uphill climb to 3000ft a.s.l. and then some high speed overtaking, (in D), the van suddenly had a series of "misses". First i OD, then i stayed in D to check and it did it again. It felt like it would try to downshift on its own.
I suspected low level tranny fluid and put in a little as the reading was just below hatched area.
It worked, no more hesitation, but now it feels like D is slipping. The rpm seems high when I start from still, and the response to throttle inc is poor.
The responce to throt. is good in 1.st, have never been good in 2.nd.
Now it has been sitting overnight and I'm about to check again.
Q: Have I fryed the D band? Or the converter?
After a long, winding uphill climb to 3000ft a.s.l. and then some high speed overtaking, (in D), the van suddenly had a series of "misses". First i OD, then i stayed in D to check and it did it again. It felt like it would try to downshift on its own.
I suspected low level tranny fluid and put in a little as the reading was just below hatched area.
It worked, no more hesitation, but now it feels like D is slipping. The rpm seems high when I start from still, and the response to throttle inc is poor.
The responce to throt. is good in 1.st, have never been good in 2.nd.
Now it has been sitting overnight and I'm about to check again.
Q: Have I fryed the D band? Or the converter?
Post Fiend
Joined: Oct 2005
Posts: 5,242
Likes: 0
From: Kiev, Ukraine
I think you toasted direct clutch and bad 2nd gear band. Bands are used for 2nd gear and OD. have you sliping driving in OD ore R?
Anyway to change any band ore disk you are to put all tranny apart. So there is a reason to rebuild tranny replacing all worn parts. I advice you do not drive till tranny die, becouse dirty ATF is very harmfull for valve body and tranny overheating may cause more damage.
Anyway to change any band ore disk you are to put all tranny apart. So there is a reason to rebuild tranny replacing all worn parts. I advice you do not drive till tranny die, becouse dirty ATF is very harmfull for valve body and tranny overheating may cause more damage.
Thread Starter
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Junior User
Joined: Aug 2003
Posts: 83
Likes: 0
From: Bergen, Norway
No slip in OD. 2.nd have been slippery-ish from day one of this tranny. Topped up the fluid to upper edge of markings and it seems to run fairly well. Didn't try OD yet. Found the exhaust almost down, middle fastener off and flexhose shredded. Noisy. Fixed with exh. tape and wire...
Thanx, PabloU-A
Thanx, PabloU-A
Post Fiend
Joined: Oct 2005
Posts: 5,242
Likes: 0
From: Kiev, Ukraine
If you have no slipping in OD you should not have slipping on 3rd (direct), but... may be TC is bad and there is no slipping in OD becouse converter clutch is engaged.
To stop sliping in 2nd try to ajust band. It is easy.
BTW. Ford Scorpio 2.9 tranny fits aerostar with bellhousing swap. You can use Ford Scorpio torq. converter, but with torque converter from diesel car/van aero runs better.
To stop sliping in 2nd try to ajust band. It is easy.
BTW. Ford Scorpio 2.9 tranny fits aerostar with bellhousing swap. You can use Ford Scorpio torq. converter, but with torque converter from diesel car/van aero runs better.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
The bands really are not adjustable. The adjustments are meant for the one time adjustment when they are installed. If the bands are worn enough to slip, they are pretty thin at that point and could break completely at any time. Just replace the worn bands, plug anything else that is convenient to replace when you are in there. You can get nice upgrade bands too, which last longer and shift firmer.
A4LD Performance Transmission and Parts from PATC, A4LD
A4LD Performance Transmission and Parts from PATC, A4LD
Post Fiend
Joined: Oct 2005
Posts: 5,242
Likes: 0
From: Kiev, Ukraine
Band ajusting helps. Usually 2nd gear band fails first. Ajusted 2 times band failed in 60K and I had to accelerate fooring gas, release gas pedal and tranny engaged direct gear skiping 2nd. OD worked well. To change broken band I had to put all tranny apart. You know what I say about.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
It helps, but they really aren't meant to be adjusted at that point. My local shop mentioned that to me as well. Back in the day, bands used to be like brake pads, big and thick, but today, they are very thin. If they have worn down enough to start slipping, they have little usable life left. If you retighten them, they might fine for a while longer. Once they start slipping, they burn, and that breaks down the binders that hold them together. So retightening them might work for a while, but the friction material that is left on the bands will still wear off quickly. Replacement bands are really not that expensive.
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Post Fiend
Joined: Oct 2005
Posts: 5,242
Likes: 0
From: Kiev, Ukraine
Replacement bands are really not that expensive.
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From one point labor in EU is more expencive then in the USA (Euro:$ exchange course is high), but A4LD was very polpular in EU, usually made in France, so it is easy to get parts. All A4LD parts exept of bellhousing of Scorpio and Sierra 2.9 fit aero's tranny. A4LD was used with 1.8, 2.0, 2.4 and 2.5 engines too but bands are the same, but disks of forward and direct clutch are thiner and TC is different, so look for A4LD rebuild kits for Scorpio 2.9 ore Sierra 2.9, also pay attention on kits for Transit with 2.4 diesel.
_______________________________________
From one point labor in EU is more expencive then in the USA (Euro:$ exchange course is high), but A4LD was very polpular in EU, usually made in France, so it is easy to get parts. All A4LD parts exept of bellhousing of Scorpio and Sierra 2.9 fit aero's tranny. A4LD was used with 1.8, 2.0, 2.4 and 2.5 engines too but bands are the same, but disks of forward and direct clutch are thiner and TC is different, so look for A4LD rebuild kits for Scorpio 2.9 ore Sierra 2.9, also pay attention on kits for Transit with 2.4 diesel.
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